Beflectob



P. A. NIRDLINGER.

REFLECTOR.

APPLICATION FILED FEB. 24. 1919.

1,363,261 Patented Dec. 28, 1920.

UNITED STATES i PATRICK A. NIRDLINGER OE CHICAGO, ILLINOIS.

REFLECTOR.

Specification of Letters Patent.

Patented nee. 28, 1920.

Application filed February 24, 1919. Serial No. 278,664.

To all whom it may concern:

Be it known that I, PATRICK A. Nine- LINGER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reflectors, of which the following is a specification.

This invention has for its object the provision of a reflector and light which shall be of improved construction and operation.

The invention is exemplified in the combination and arrangement of arts shown in the accompanying drawings and described in the following specification, and it is more particularly pointed out in the appended claims.

In the drawings- Figure 1 is a section through a projector or flood light provided with a reflector embodying the present invention.

Fig. 2 is a plan view of the lamp mounting shown in Fig. 1.

In the construction of reflectors for flood lights and similar purposes, as well as in the manufacture of plain reflectors it has been the common practice to coat the back of a piece of glass with a metallic substance, such as mercury, and use the surface of the metallic coating adjacent the glass as the reflecting surface. It has also been common to use polished metal surfaces for reflecting purposes. Where a glass reflector is used in conjunction with a source of light, the heat from the light source will cause the metallic coating to peel after a period of use, and the construction of accurately-shaped concave mirrors of glass is also expensive. The fact that the light must pass through the glass plate twice is also objectionable. Polished metal reflectors are very efficient when new, but they tarnish very rapidly and soon lose their efficiency.

The present invention contemplates the construction of a reflector having the body portion made of earthenware or other material that will take a glaze, the body being coated with a thin film of a reflecting substance which is fired into the glaze of the earthenware in the manner employed for the decoration of china and similar articles. The body of the reflector may be of stoneware, porcelain, or any other form of earthenware or other material to which a glaze flecting substance is indicated as covering the concave side of the reflector at 8. It is not intended to represent the relative proportions of the coatlng 8 to the bodyportion 7, but the section is only diagrammatic to show the position of the coating upon the body portion of the reflector. As a matter of fact the coating 8 is much thinner than is indi cated by the figure, and is in fact only a very plnn film upon the surface of the body porion.

To produce the reflecting surface upon the earthenware body the material commonly employed for producing silver decorations upon chma and known by the trade name of silver bright may be used. This material as a matter f fact is usually composed chiefly of platinum instead of silver as the name would indicate, and is prepared by rubbing up finely divided platinum in a viscous material, such as spirits of turpentine mixed with fat oil, or thick gum water. ue to the finely divided state of the platinum the material has a dark brown color and does not show a metallic luster until after it is applied. lVhile a material prepared in this way is the best one now known to me for the purpose, it will be understood that other coating materials may be used, such as gold and silver, prepared in a similar manner, or

- other materials which will stand firing, and

which when applied will produce a reflecting surface.

In preparing a reflector the earthenware is shaped into the desired form and burned and glazed in the usual manner. After the earthenware body has thus been prepared, the reflecting surface, which is commonly a concave surface, is coated with a thin film of the reflecting material, such as that previously described, and the reflector thus prepared is placed in a kiln and burned in the manner well known in china decorating. The heat of the kiln causes the metal coating to be absorbed in the glaze on the earthen were body so that after the firing is complete, the coated surface has a brilliant reflecting surface, very closely resembling a highly polished surface of a solid metallic reflector. In some cases it may be desired to apply a second coating of glaze on top of the metallic coating, but this is usually not ne essary as the metal which has been burned into the original glaze of the earthenware body is protected by the glaze and is not affected in any way by heat from thg 2 eeann source of light, or by rubbing of the sijirfzice coated. The reflector when once coinpletefl is practically indestructible so long the earthenware bocly is not broken, for the metellic coating does not tarnish, being thoroughly cover d by the oil: the

earthenware, and will not peel uncle the influence of heat and light.

The cost of e reflector constructed acc rding to the present invent-in compared with other i? v the reason that the formed into various the con ing of metal i., n ot the motel employec i 1 li In the (l rewing li ght hone-in c rthenwere Oi similar mater. rifled with ere'iiecti upon ti e concave i housing; to form e. e nineting tr inv it lainp fleeting surface oi? the i;- iug may he in "c in any 'iorin shown in the rlr holic, 218 this is the term (2: ll()0(l lights. The lamp J interior of the housing thereof. there being an opening the wires 1.1. which cal-" c light. The lamp socket by screws 12:) which ext-e formed in the l' of elongated to permit of lamp 9 toward and away 7' surface The acljustn for the purpcproperly source of light to the focus of t cost surface. The housing any Suitable Support 15 by screw ilownwzirtlly through th iiig into the support. ll

erihly provide-(l with ii 5.1 in. place by :1, frame lo Ventilator openings; 20 a base of the housing. and 21 are PlTOvlQlG-(l, in the part shove the lump 5 hut (in ml:

2 The openings E21 235' with ducts which iXllQilfl the top of the houeiire within of which. the housing in 10mm; at points at 23 henczith an flange or venthe: Shel inent will permit 'free circulation through the interior of the housing. l protect the light 5) against the e zilltl that the housing is inzitle of; material which is not affected by corrocling agencies, so that herring breakage, its life is prectiearly unlimited.

Clttln'l:

it projecting lamp comprising 2L housing llllilO of earthenware en-cl eheped to prole {111 inner reflecting s ir'tece. it metallic and held 11 nwiire coating secured to said. surface hereon by glaze nietel a l, said cart e.

lionsi having" ventilating ducts termed therein and connectingl nterior said ing with the on er e izinosphert. the

outer openings of said (lllClls oeinp; lis iosed helow the interior ooening of zii l ducts when soul housing 18 in upright posith n to prei'ent eutiince oit' moisture thr 'iu i Silltl (lllC'l'S projecting: lzuu COIHPL'lSl'LlQ (U1 earthenware houslng hzivi 1 the i: terior All :1 perzilgiolic reiiector. 1: on the well oii' Sill l .i'ioveal rem tl i e cting' siirizice surface t2 einein un- 1 po tion thereo 1 Proof shaped to toi mounting tor il- .oti: 'c hinting on Slll ace :nrrl IMP he (l'l'lC'i'F tori'neil in the walls oi? Sil'fll izii'is-aiiio; and herino inner and outer openly to one another ll. projecting); 4 comprising an curtl enwe '0 housing: eiui icil to pr-zwhin 21 SHlf:SiP-...t l. tlly pzilehol e inner reflecting: euri ece. P. mounting: for :i I

ll of Shirl. homing at :1 in ll'lOYWl cm the parabolic axis oi eiihl rmiiccting iiaco to leave the oitiOn of Your central 1, rol'lec'or iiiiihstructeil ii metallic re All V p and held. in place thereon liy glam material and having-g :1. coating: of glaze ll'llti'Gl'lUl ciwering said inotsiilie mating and ventilatlug: 4.11m iorincii in the .lls oi mill hon hip; and haying: inin :aiul :lltl openings i nether.

therefor oilset relatively one to z the upper openings oi. Sillil Clucle being "prw tectecl i) an overhanging flange.

in testimony whereof l have sinned my name 0 this specification on this 520th (flay of February A. D. 1919.

llli 

